Humanity loves fetishes, and humanity will continue to love fetishes until it dies off. Simple as that. Therefore, it creates porn to satisfy people with the same fetish. It's pretty amazing how many times Rules 34 and 35 have been fulfilled - if you look hard enough, you can find pretty much anything.

Of course, it might take a while for Rule 35 to be fulfilled... but, then again, the anticipation is always better than actually having something, right? ...right?